Bag making machine



BAG MAKING MACHINE Filed April 14, 1932 '7 Sheets-Sheet 2 Fig/0.

INVENTORS ll A/benASc/m/lmd Arm/2am Nor/ck.

BY @wwwfw ATTORNEYS V May 19, 19 36. A. AfscHoLL ET AL BAG MAKING MACHINE Filed April .14, 1952 7 Sheets-SheetS INVENTORS A/kerf A. Small and Aha/24m Mr/ ZK.

A TTORNE Y5 May 19, 1936. .A. A. SCHOLL ET AL BAG MAKING MACHINE Filed April 14, 1932 7 Sheet-Shept 4 iNVENTORs Alfie/7 A 56/70 and Aha/2am Nay/ck BY f- ATTORNEYS y 19367 A. A. SCHOLL ET AL 2,041,301

BAG MAKING MACHINE Filed April 14, 1932 7 Sheets-Sheet 5 IN VEN TORS A/kerf A. Schol/ and Alva/2am A/ow'c/c A TTORNE Y5 May 1-9, 1936.

I A. A. SCHOLL ET AL BAG MAKING MACHINE Filed April 14, 1952 7 Sheets-Sheet 6 INVENTORS A/kerf A. 36/70 and Abra/2am Nor/ck.

@ww ATTORNEYS y' 1936- A. A. SCHOLL 5%" AL $041,301

BAG MAKniG MACHINE Filed April 14, 1952 7 Sheets-Sheet '7 INVENTORS A/berf A. Small and Abraham Abr/kk.

A TTORNEYS Patented May 19, 1936 UNITED STATES BAG MAKING MACHINE Albert A. Scholl, Bronxville, and, Abraham Novick, Flushing, N. Y., assignors to Internai tional Paper Company, New York, N. Y., a corporation of New York Application April 14, 1932, serial No. 605,191

12 Claims.

This invention relates 'to bag making and has for an object to provide a machine capable of making bags at a high rate of output and in such manner that thelower ends of the bags are thoroughly sealed. The invention is illustrated herein in connection with the making of a bag of the kind disclosed in our application, filed of even date, for Bag and Method of Making Same. The bag referred to is in the form of a tube of cellophane or other air impervious material having the lower end thereof folded toform a portion of double tube thickness and havingthe portion of double tube thickness foldedover against a face of the bag body and adhesively united to it.

It is a feature of the present invention that provision is made of means for forming a first tuck nearone end of the bag material, means for folding over the end portion that extends beyond the tuck, means for forming a second tuck 20 while holding the bag material gripped at the first tuck, and ,means for applying adhesive to the bag body and for pressing down the double lfaolfiled bag end to adhesively unite it to the bag Other objects and advantages will hereinafter appear.

t In the drawings forming part of this specifica- Figure 1 is a diagrammatic view in side eleva- 30 tion illustrating the principal operating elements {of a machine embodying features of the inven- Figure 2 is a View in front elevation of a-finished bag as made by the machine of Figure 1;

Figure 3 is a fragmentary, vertical, sectional view taken on the line1--3 of Figure 2, looking 'in the direction of the arrows;

Figures 4 to 9, inclusive, illustrate successive steps in the forming of a bag blank as shown in 40 Figure 4 into a finished bag as shown in Figure 9;

Figure 10 is a transverse, vertical, sectional view illustrating the cylinder on which the bag end is tucked, folded and pasted, and associated parts;

Figure 11 is a fragmentary, sectional view taken I 45 on the line lI-ll of Figure 10, looking in the direction of the arrows;

Figures 12 to 22, inclusive, are fragmentary sectional views similar to Figure 11 but showing successively the operations performed on a bag blank as it travels around the cylinder; and

Figure 23 is a diagrammatic side elevation illustrating the arrangement of gears for driving the cylinder'and various mechanisms associated with the cylinder.

55 Thebag material which is desirably a web l of cellophane is supplied to the machine continuously from a reel 2. The web I passes around a guide roller 3 and then between rollers 4 and 5. The roller 5 is narrow and engages only a marginal portion of the web. This roller runs in a gum= pot 6 and applies adhesive continuously to the marginal portion of the web engaged by it. From the roller 4 the web I passes to tube forming mechanism '1 of the kind commonly employed in bag making machinery. This tubeforming mechanism may be of a type well known in the art. It comprises a forming plate 8 and rollers 9 and Ill. From the tube-forming mechanism the web continues in tube form between feed rollers II and I2 and thence between cylinders l3 and M which carry cooperatingknives l5 and l6.'

The knives I5 and I6 cooperate to sever successive bag blanks from the leading end of the web, one blank being severed at each complete revolution of the rollers l3 and I4. At the time of severance the leading end of the blank I! is disposed between feed rollers l9 and but is not gripped by thembec ause of the provision' of a segmental cut-out 2| in the periphery of the feed roller l9.

Immediately after severance the blank is gripped by the rollers l9 and 20 and advanced by them into engagement with the periphery of a main operating cylinder 22. The cylinder 22 is fast upon a shaft 23 which is continuously and uniformly rotated in any convenient manner. This cylinder carries instrumentalities for operating on the leading end of the blank and is surrounded by other instrumentalities all acting in time with the cylinder for performing successive operations on the blank as it travels around the cylinder.

The first operation is to tuck the leading end of the blank into position to be gripped between a fixedjaw 24 and a movable jaw 25 carried by the cylinder. This operation is illustrated in Figures 12 and 13. The movable jaw 25 rests in the bottom of a V-shaped slot 26 formed in the periphery of the cylinder and has its ends extended beneath retaining plates 21 secured to opposite ends of the cylinder (see particularly Figures 10 and 11). Plungers 28 are provided each being mounted in a bore 29 that extends along a chord of the cylinder and is pressed outward against the jaw 25 by a compression spring 30 disposed in the bore 29. A plug 3| threaded into the introductory'end of the bore 29 serves to maintain the spring 30 under compression so that the plunger always presses against thejaw 25 with aforce 55 tending to close such jaw against the fixed jaw 24. The strength of the spring 36 may also be varied by the screw plug 3|. The jaw has a tail portion 32 fast with it which is ordinarily ineffective but which comes into engagement with a cam member 33 fixed on a frame member or side plate 34 a short time before the jaw reaches the position of Figure 12. The interaction of the cam 33 and the tail portion 32 produces a rocking movement of the jaw 25 to an open position like that illustrated in Figure 12. In the position of Figure 12 the leading end of the bag blank is tucked between the jaws 24 and 25, and at this instant the tail portion 32 snaps off of the cam 33 so that the jaw 25 is caused by the plunger 28 to spring to closed position as illustrated in Figure 13. The short leading end portion 35 of the blank beyond the tuck 6 formed and gripped by the jaws 24 and 25 is of predetermined length because the delivery of the blank to the cylinder is accurately timed with relation to the cylinder. This leading end portion 35 is swung to an upstanding position like that illustrated in Figure 13 by the swinging of the jaw 25 to closed position.

The tucking of the bag blank between the jaws 24 and 25 is performed by a tucking blade 36. This tucking blade is carried at the outer end of a crank bar 31 which is fast on a constantly rotating shaft 38. The shaft 38 makes two complete revolutions for each complete revolution of the cylinder 22 so that the tucking blade cooperates with the jaws 24 and 25 illustrated in Figure 12 and again cooperates in the same manner with a duplicate set of jaws-24 and 25 carried by the cylinder 22 at a diametrically opposite point (see Figure 11) The tucking blade 36 is not rigid with the crank bar 3'! but is loosely impaled upon bolts 39 threaded into the crank 31. Springs 40 encircle the shanks of the bolts 39 and bear against the body portion of the tucking blade 36 to maintain it normally in contact with the face of the crank 31. The springs 48 bear at their opposite ends against the heads of the bolts 39. The base of the tucking blade 36 bears against a fixed abutment 4| fast on the crank 31.

The next step is to turn over and iron down the bag end 35 firmly against the peripheral face of jaw 24 so that it will not spring away from the jaw when relieved of the pressure of the ironing means. To this end provision is made of a folding and ironing blade 42 fast on a rock shaft 43. The rock shaft also has fast upon it an arm 44 connected by a spring 45 to the frame member 34, and an arm 46 which stands in the path of a pin 41 carried by the cylinder. The spring normally holds the arms 44 and 46 and the blade 42 in the position illustrated in Figures 12 and 14. When the pin 41 comes into engagement with the arm 46, however, the shaft 43 is rocked counter-clockwise to carry the parts mentioned to the position illustrated in Figures 12 and 13. It will be observed that this occurs just as the bag end 35 approaches the blade 42. The left hand end of the blade (as seen in Figures 12 and 13) is thus swung down close to the periphery of the cylinder 22 into position to intercept and fold over the end portion 35 of the bag. As the bag end travels beneath the plate 42 the pin 41 passes beyond the arm 46 so that the right hand end of the plate 42 is swung to the position illustrated in Figure 14. In this position the plate bears with spring pressure against the periphery of the cylinder and irons down the bag end 35.

The next operation performed upon the bag blank isto tuck it between the fixed jaw 24 and a movable jaw 48 and to cause said jaws to grip the portion thus tucked. The jaw 48 is rockably supported in a V-shaped groove 49 formed in the periphery of the cylinder and has the ends 5 thereof received beneath the plates 21. One end of the jaw is provided with a tail member 56 which is adapted to be brought into co-active engagement with a fixed cam member 5|. The jaw 48 is normally maintained in closed position 10 by means of plungers 52 each mounted in a bore 53 that extends along a chord of the cylinder. The plunger is urged against the jaw. by a compression spring 54 held in the bore by a plug 55 that is threaded in the bore at the introductory 15 end thereof. The tail 58 comes into engagement with the cam 5| to swing the jaw 48 to open position just before the parts reach the tucking position of Figure 15. The bag material is tucked into position to be gripped by the jaws by means of a tucking blade 56 which is yieldingly carried on a crank bar 51 fast on a continuously rotating shaft 58. The shaft 58 makes two revolutions for every complete revolution of the cylinder 22 and is timed to effect a tucking 25 operation when the cylinder parts are in the positions illustrated in Figure 15. At this point the tail 53 snaps off of the cam 5| permitting the plunger 52 to swing the jaw 48 to 'closed position as illustrated in Figure 16. In this position both tucks of the bag are gripped, the first between jaws 24 and 25 and the second between jaws 24 and 48.

The tail 32 of jaw 25 next moves into engagement with a fixed cam member 58 which actuates the tail to move the jaw 25 to open position. In Figure 17 the jaw 25 is illustrated as held open by the co-action of the tail 32 and the cam 58. This releases the bag material at the point of the first tuck and the doubled over bag end 66 springs upward to a position like that illustrated in Figure 17.

A gummer bar 6| fast on a shaft 62 that makes two revolutions for each revolution of the cylinder 22 travels in a path to take gum from a gum pick-up roller 63 disposed in a gum pot 64, and to apply the gum to that portion of the bag which overlies the jaw 48 ,as illustrated in Figures 17 and 18. 1

The doubled over bag end is next carried beneath a fixed folding bar 65 and arcuate guide rods 66. The end is thus pressed down against and adhesively united to the gummed body portion of the bag.

While the folded end of the bag is travelling beneath the guide rods 66 it is carried opposite feed rollers 61 which rotate at the same peripheral speed as the cylinder 22 and which throughout the major portion of its periphery contacts with the cylinder 22 to form a feed couple. The feed rollers 6'| have a segmental cut-out 68 provided which, as will be observed from an inspection of Figure 20, arrives opposite the cylinder at the proper time to escape engagement with the relatively thick folded end of the bag. The continued travel of the bag, however, brings the body portion of the bag between the cylindrical portion of the feed roller 61 and the cylinder 22 so that these elements cooperate to continue the. advance of the bag. After the feed roller 61 has been made effective to feed the bag the gripper'48 is moved to open position. The opening of the gripper is accomplished by the provision of a fixed cam 68 in the path of the tail 56. In Figure 21 the gripper 48 is standa gear 80 journalled on a. shaft 8| and the gear ing open, the bag end has-been released from between the jaws 48 and 24, and the bag is being advanced by the coaction of the cylinder 22 and the feed roller 61.

In the continued advance of the bag by the roller 61 and the cylinder 22 the folded bag end is ironed down firmly and uniformly by means of a pressing bar 10. The pressing bar I is fast upon a shaft H which rotates continuously and in time with the cylinder 22 to make two complete revolutions for one complete revolution of the cylinder.

The bag is now completed and is delivered acrossa table 12 and between feed rollers 13 and 14. The feed rollers 13 and 14 are fast respectively on shafts l and I6 and arecontinuously driven at the same peripheral speed as the cylinder 22. The feed rollers 14 and I5 advance the finished bag across a short table 11 and cause it to be deposited upon a stack in a receptacle 18.

From what has been said, it will be under- I stood that two bags are delivered for each complete revolution ofthe cylinder 22, the sets of jaws 24, 25, 48 being duplicated at diametrically opposite points and all of the rotary parts disposed about the cylinder being arranged to operate at twice the rotary speed of the cylinder.

The gearing whereby the various parts are thus timed is illustrated diagrammatically in Figure 23. The shaft 23, of the cylinder 22,

which shaft may be connected to any, suitable source of power, has fast upon it a large gear 19 through which the other gears illustrated are driven. The gear 19, Figures and 23, drives 80 in' turn drives agear 82 fast on a shaft 83. The gear 82 drives a gear 84 fast on a shaft85. The feed rollers and I9 are fast, respectively, upon the shafts 83 and 85 and the gear ratios are such that these feed rollers operate at the same peripheral speed as the cylinder 22. The gear 19 also drives a gear 86 having one half as many teeth as the gear 19. The gear 86 is fast upon the shaft 38 by which the tucked blade 36 is carried.

The gear 19 also drives a gear 81 having half as many teeth as the gear 19. The gear 81 is fast upon the shaft 58 by which the tucked blade 58 is carried.

The gear 19 also drives a gear 88 having half as many teeth as the gear 19. The gear 88 is The gear I9 also drives a small gear 92 jour-- nalled on a shaft 93. The gear 92 drives a gear 94' fast on shaft 15 and the gear 94 in turn drives a gear 95 fast on the shaft 16. The ratios of gears 19, 92, 94 and 95 are such that the feed rollers 13 and 14, fast, respectively, on the shafts I5 and 16, are driven at the same peripheral speed as the cylinder 22.

We have described what we believe to be the best embodiment of our invention. We do not wish, however, to be confined to the embodiment shown, but what we desire to cover by Letters Patent is set forth in the appended claims.

by the cylinder for gripping the second, tuck,

means for effecting the release of the bagma-- terial at the first tuck to leave free the end portion of double tube thickness in advance of the second tuck, means for gumming a portion of the blank body adjacent the second tuck, means for folding over the end portion of double tube thickness against the gummed portion, means coacting with the cylinder to take over control of the feeding of the blank, means for effecting release of the bag material at the second tuck, means for ironing down the folded and gummed portion of the bag, and means for inder.

2. In a bag making machine, in combination, means for delivering tubular bag blanks, a cylinder, fixed and movable jaws carried by the conducting the finished bag away from the cylcylinder, the cylinder being provided with a bore extending along a chord, a plunger received and guided by the bore and bearing against the movable jaw, a spring enclosed in the bore and bearing against an end of the plunger, and a plug removably secured in the bore for maintaining the spring compressed.

3. In a bag making machine, in combination, means for delivering tubular bag blanks, a cylinder, fixed and movable jaws carried by the cylinder, the cylinder being provided with a bore extending along a chord, a plunger in the bore bearing against the movable jaw, a spring in the bore, a plug removably secured in the bore for maintaining the spring compressed, a tail on the movable jaw for moving the jaw to open position, and an abutment in the path of the tail for actuating the tail at a predetermined point. 4. In a bag making machine, in combination,

a cylinder, means carried by the cylinder to grip and carry forward a bag blank, a folding and pressing member pivoted intermediate its ends and closely adjacent the cylinder, means to tilt said member to cause one end thereof to move toward the cylinder into position to intercept and fold over an end portion of the blank, and means to thereafter tilt the member in the opposite direction to cause the opposite end of said member to engage and iron down the folded end portion.

5. In a bag making machine, in combination,

a cylinder, means carried by the cylinder to grip;

and carry forward a bag blank, a folding and pressing member pivoted intermediate its ends and closely adjacent the cylinder, means to tilt said member to cause one end thereof to move toward the cylinder into positionto intercept and tion, comprising an abutment carried by the cylinder for timing the tilting of said member.

6. In a bag making machine, in combination, means for forming a flattened tube of flexible material; means for severing tubular blanks thenefrom, means for forming a first fold in a bag blank to provide an end portion of double tube thickness, and means for folding the portion of double tube thickness and adhesively uniting it to the body portion of the blank.

7. In a bag making machine, in combination, means for forming a flattened tube of flexible material; means for severing tubular blanks therefrom, means for forming succesive folds in the same direction in an end of a blank, and. means for adhesively uniting the folded portion to the blank body.

8. In a bag making machine, in combination, means for forming a flattened tube of flexible material; means for severing tubular blanks therefrom, means for forming successive folds in the same direction in an end of a blank, and means for uniting the folded portion to the blank body.

9. In a bag making machine, in combination, means for delivering tubular blanks, means for forming simultaneously throughout the transverse width of the bag blank a first fold to provide an end portion of double tube thickness, and means for folding simultaneously across the entire transverse width of the bag blank the portion of double tube thickness and adhesively unit ing it to the body portion of the blank.

10. In a bag making machine, in combination, means for delivering tubular blanks in a direction parallel to a length thereof, means for forming successive transverse folds in an end of a blank and means for uniting the folded portion to the body of the blank.

11. In a bag making machine, means for forming tubular blanks, a cylinder comprising oper-- ating members, other operating members adjacent said cylinder and cooperating with said cylinder and said first mentioned operating members to provide an end portion of double fold thickness upon the blanks, and an adhesive applier adjacent said cylinder to apply adhesive to said double tube thickness whereby the same may be united to the body portion of the blank.

12. In a bag making machine, a folding cylinder comprising means simultaneously to hold a plurality of tube lengths fed thereto in end to end relation, and means cooperating with said cylinder and successively operating upon each blank to provide a double folded portion in one end thereof and adhesively to unite the said double folded portion to the body portion of the blank.

ALBERT A. SCHOLL. ABRAHAM NOVICK. 

